Describes the role that group workers can play in program evaluation. Encourages people who are skilled conducting groups to apply their skills to program evaluation. Discusses the competencies and preparation necessary to function in the combined roles of evaluator and group worker. (Author/ABB)

Reviews literature on member characteristics and conditions that increase the likelihood of group participation. Describes positive consequences of small group participation and antecedents to participation including attitudes, atmosphere, leader characteristics, expectations, and group structure. (JAC)